lighting fixtures

Abstract

An embodiment of the present invention provides a lighting fixture comprising a light source, a lens array, a collimating optical element, and a reflector array. The lens array includes multiple lens units for splitting light emitted by the light source into multiple sub-beams and converging the multiple sub-beams separately. The distance between the convergence point of the multiple sub-beams and the focal plane of the collimating optical element is less than or equal to 10% of the focal length of the collimating optical element. The collimating optical element is used to collimate the multiple sub-beams, and the reflector array is used to receive the collimated multiple sub-beams and reflect them to form a light spot array. The lighting fixture of the present invention not only has a simple structure, is easy to install, and is compact, which facilitates miniaturization of the lighting fixture, but also effectively avoids the generation of stray light, improves the contrast of the projected light spot pattern, and enhances the decorative lighting effect.

Description

Technical Field

[0001] The present invention relates to the field of lighting technology, and in particular to a lighting fixture. Background Art

[0002] In the lighting industry, lamps are used to emit light beams to provide the desired lighting effects. As living standards improve, the demand for decorative lighting is increasing. Starry sky decorative lights project numerous star-shaped or snowflake-like light spots, creating an atmosphere and decorating the landscape. They are widely used in parks, KTVs, stages, courtyards, lawns, and other occasions.

[0003] To increase the number of projected light spots, existing starry sky decorative lights typically surround the light source with a light-collecting device consisting of multiple plane reflectors, creating multiple equivalent virtual light spots. The more plane reflectors there are, the more equivalent virtual light spots there are, and the greater the number of projected light spots. However, this solution has the following disadvantages: 1. The plane reflectors are difficult to mount, their number is limited, and they take up a lot of space; 2. The gaps between the plane reflectors and their fixing structure generate a lot of stray light, resulting in poor contrast in the light spot pattern, which in turn affects the light spot effect. Summary of the Invention

[0004] The embodiments of the present invention provide a lighting fixture to solve the above technical problems.

[0005] An embodiment of the present invention provides a lighting fixture, including a light source, a lens array, a collimating optical element and a reflector array. The lens array includes multiple lens units, which are used to split light emitted by the light source into multiple sub-beams and converge the multiple sub-beams separately. The distance between the convergence points of the multiple sub-beams and the focal plane of the collimating optical element is less than or equal to 10% of the focal length of the collimating optical element. The collimating optical element is used to collimate the multiple sub-beams. The reflector array is used to receive the collimated multiple sub-beams and reflect them to form a light spot array.

[0006] In one embodiment, the divergence angle of the light emitted by the light source is less than or equal to 60 degrees.

[0007] In one embodiment, the size of at least one lens unit is different from the size of the other lens units.

[0008] In one embodiment, the focal length of at least one lens unit is different from the focal lengths of other lens units, and the multiple lens units are located in different planes.

[0009] In one embodiment, the lens array includes a middle area and a surrounding area, the size and focal length of the lens units located in the middle area are larger than the size and focal length of the lens units located in the surrounding area, and the distance between the lens units located in the middle area and the focal plane is larger than the distance between the lens units located in the surrounding area and the focal plane.

[0010] In one embodiment, the lighting fixture further comprises an aperture located at the focal plane, the aperture comprising a plurality of through holes respectively corresponding to the convergence points of the plurality of sub-beams.

[0011] In one embodiment, the lighting fixture further includes a polygonal prism located between the aperture and the collimating optical element, the polygonal prism includes at least two prism units, the incident surfaces or the exit surfaces of the at least two prism units have different inclination angles, and at least one sub-beam is incident on the at least two prism units.

[0012] In one embodiment, the lighting fixture further includes a color filter located between the aperture and the collimating optical element, and the color filter covers the optical path of at least one sub-beam.

[0013] In one embodiment, the lighting fixture further comprises a reflective device located between the aperture and the collimating optical element, and the reflective device is configured to collect light of a portion of the sub-beams and reflect the light to the collimating optical element.

[0014] In one embodiment, the lighting fixture further comprises a convex lens located between the aperture and the collimating optical element, and the convex lens is used to collect light that is not reflected by the reflective device.

[0015] In one embodiment, an angle enlarging element is provided between the light source and the at least one lens unit.

[0016] In one embodiment, the light source includes at least two sub-light sources and a light combining device, wherein the at least two sub-light sources are located on different sides of the light combining device, and the light combining device is used to combine the light emitted by the multiple sub-light sources into one beam.

[0017] In one embodiment, the light source includes a plurality of sub-light sources arranged in an array, and each sub-light source corresponds to a lens unit.

[0018] In one embodiment, the lighting fixture further includes a driving device, which is used to drive the lens array to rotate.

[0019] A lighting fixture provided in an embodiment of the present invention includes a light source, a lens array, a collimating optical element and a reflector array. The light source is used to emit parallel or nearly parallel light. The lens array includes multiple lens units, which are used to split the light emitted by the light source into multiple sub-beams and converge the multiple sub-beams separately. The multiple sub-beams are focused on the focal plane or near the focal plane of the collimating optical element. The collimating optical element is used to collimate the multiple sub-beams. The reflector array is used to receive the collimated multiple sub-beams and reflect them to form a light spot array. The solution of the present invention divides the light emitted by the light source into multiple sub-beams through a lens array, and focuses the multiple sub-beams on the focal plane or near the focal plane of the collimating optical element. The convergence point of each sub-beam is equivalent to a light-emitting point. The multiple sub-beams are then collimated into multiple sub-collimated beams through the collimating optical element, so that the reflector array reflects to form a light spot array. This solution only needs to use a lens array to divide the light emitted by the light source to increase the number of projected light spots, reduces the number of devices that need to be installed, and does not have gaps that increase the space. It has a simple structure, is easy to install, and has a small size, which is conducive to the miniaturization of lighting fixtures. The absence of gaps can effectively avoid the generation of stray light, improve the contrast of the projected light spot pattern, and enhance the decorative lighting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 is a structural diagram of a lighting fixture provided in Embodiment 1 of the present invention;

[0022] Figure 2 is a structural diagram of a lighting fixture provided by a second embodiment of the present invention;

[0023] Figure 3 is a schematic structural diagram of a lighting fixture provided by a third embodiment of the present invention;

[0024] Figure 4 is a structural diagram of a lighting fixture provided by a fourth embodiment of the present invention;

[0025] Figure 5 is a structural diagram of a lighting fixture provided by a fifth embodiment of the present invention;

[0026] Figure 6 is a structural diagram of a lighting fixture provided by a sixth embodiment of the present invention;

[0027] Figure 7It is a structural diagram of a lighting fixture provided in Embodiment 7 of the present invention. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0030] Implementation method one:

[0031] See also Figure 1 , Figure 1 FIG1 is a schematic structural diagram of a lighting fixture 100 provided in accordance with Embodiment 1 of the present invention. The lighting fixture 100 includes a light source, a lens array 120 , a collimating optical element 130 , and a reflector array 140 .

[0032] The light source is used to emit light, and the lens array 130 includes multiple lens units, which are used to split the light emitted by the light source into multiple sub-beams and converge the multiple sub-beams separately. The multiple sub-beams are focused on the focal plane of the collimating optical element 130. The collimating optical element 130 is used to collimate the multiple sub-beams. The reflector array 140 is used to receive the collimated multiple sub-beams to reflect and form a light spot array.

[0033] Specifically, in this embodiment, the light source may include a point light source 111 and an optical collection system 112. The point light source 111 emits light with a certain divergence angle. The point light source 111 has a large divergence angle, and its divergence angle is generally between 120 and 160 degrees. The optical collection system 112 receives the light emitted by the point light source 111 and compresses it into light with a small divergence angle. For example, it compresses it into light with a divergence angle of less than or equal to 60 degrees, that is, the divergence angle of the light emitted by the light source is less than or equal to 60 degrees. It can be understood that the smaller the divergence angle of the light emitted by the light source, the more effective it is for subsequent processing of optical devices. Preferably, the light emitted by the light source is a parallel beam or a nearly parallel beam. The point light source 111 can be an LED or a laser fluorescent light source that emits white light. When the point light source 111 is a laser fluorescent light source, the point light source 111 can include a blue laser diode and a yellow fluorescent sheet. The fluorescent sheet converts part of the blue laser emitted by the laser diode into yellow light. Finally, the unconverted blue laser and the yellow light emitted by the fluorescent powder are mixed to form white light. The optical collection system 112 can be a convex lens, a convex lens group, a reflective cup, or a TIR lens, which collects light with a divergent angle emitted by the point light source 111 and collimates it into parallel light. When the optical collection system 112 is a convex lens group, the number of convex lenses can be 2-4, and the specific number can be determined according to actual needs. For example, the optical collection system 112 is a convex lens group, and the convex lens group includes two convex lenses, namely convex lens 1121 and convex lens 1122. In this embodiment, although the light source is described as emitting white light, those skilled in the art can completely replace the light source with a light source emitting various colors such as red and green, thereby obtaining projection light spots of different colors. This simple replacement should also be included in the scope of protection of the present invention.

[0034] Furthermore, in order to improve the brightness of the light spot projected by the lighting fixture 100, the light source may include at least two sub-light sources and a light combining device, wherein the at least two sub-light sources are located on different sides of the light combining device, and the light combining device is used to combine the light emitted by multiple sub-light sources into one beam.

[0035] In one embodiment, the light source includes a first sub-light source, a second sub-light source and a light combining device, the first sub-light source and the second sub-light source emit parallel or nearly parallel light of different color bands, wherein the first sub-light source includes a first point light source and a first optical collection system, the first point light source is a laser fluorescent light source that emits yellow light, the first optical collection system is two convex lenses, the first optical collection system collects the yellow light emitted by the first point light source at a certain angle and collimates it into yellow parallel light; the second sub-light source includes a second point light source and a second optical collection system, the second point light source is an LED light source that emits blue light, the second optical collection system is two convex lenses, and the light combining device is a dichroic plate that transmits blue light and reflects yellow light, the first point light source and the second point light source are respectively arranged on both sides of the light combining device and the optical axes of the first point light source and the second point light source are both at a 45-degree angle to the light combining device, and the light combining device combines the yellow parallel light emitted by the first point light source and the blue parallel light emitted by the second point light source into a beam of white parallel light.

[0036] In another embodiment, the light source includes a third sub-light source, a fourth sub-light source, a fifth sub-light source and a light combining device, and the third sub-light source, the fourth sub-light source and the fifth sub-light source respectively emit parallel or nearly parallel light of different color bands, wherein the third sub-light source includes a third point light source and a third optical collection system, the third point light source is an LED light source that emits red light, the third optical collection system is two convex lenses, and the third optical collection system collects the red light emitted by the third point light source at a certain angle and collimates it into red parallel light; the fourth sub-light source includes a fourth point light source and a fourth optical collection system, the fourth point light source is an LED light source that emits blue light, the fourth optical collection system is two convex lenses, and the fourth optical collection system The system collects the blue light emitted by the fourth point light source at a certain angle, and collimates it into blue parallel light; the fifth sub-light source includes a fifth point light source and a fifth optical collection system, the fifth point light source is an LED light source that emits green light, the fifth optical collection system is two convex lenses, the fifth optical collection system collects the green light emitted by the fifth point light source at a certain angle, and collimates it into green parallel light; the light combining device includes a dichroic plate and a dichroic plate arranged in an X shape, the dichroic plate can transmit blue light and reflect red light, the dichroic plate transmits blue light and reflects green light, the light combining device combines the red parallel light emitted by the third point light source, the blue parallel light emitted by the fourth point light source and the green parallel light emitted by the fifth point light source into a beam of white parallel light.

[0037] In the above two solutions, the light beam emitted by multiple sub-light sources is combined into a single beam by the light combining device, thereby increasing the brightness of the light spot projected by the lighting fixture 100. It will be appreciated that the number and color of the multiple sub-light sources can be determined based on actual needs and are not limited to the above two solutions. The color of the light beam after being combined by the light combining device is not limited to white light and can also be other colors.

[0038] Of course, the light source may also include a plurality of sub-light sources, which are arranged in an array, and each sub-light source corresponds to a lens unit. The number of sub-light sources is the same as the number of lens units, and each sub-light source includes a point light source. The plurality of point light sources are mounted on the same base and are located on the same plane. As mentioned above, the point light source may be an LED or laser fluorescent light source that emits white light. An optical collection system is provided on the light-emitting side of each point light source for collecting the light emitted by the point light source and compressing it into light with a small divergence angle. Preferably, the light emitted by each point light source is collected and compressed by the optical collection system to form a parallel or nearly parallel light beam. Each sub-light source corresponds to a lens unit, so that the lens single-light receives and processes the light emitted by the sub-light source corresponding thereto. The light source adopts a plurality of sub-light sources arranged in a matrix, which can not only improve the brightness of the light spot projected by the lighting fixture 100, but also solve the problem of yellowish light spot caused by the dispersion of light emitted by the point light source at a large angle after being collected by the optical collection system when a single sub-light source is used, so that the color of the light spot projected by the lighting fixture 100 is uniform.

[0039] The lens array 120 includes a plurality of lens units, disposed on the light-emitting side of the light source, for receiving light emitted by the light source and splitting it into a plurality of sub-beams. In this embodiment, the lens array 120 is a fly-eye lens array. The lens units of the lens array 120 are closely arranged in a common plane. Each lens unit receives a portion of the light emitted by the light source and converges it to form a sub-beam. The lens units may be rectangular, hexagonal, or other polygonal shapes. The lens units may be of the same size. In this case, each lens unit receives the same amount of light from the light source, resulting in the same amount of light for each sub-beam, ultimately achieving a uniform brightness distribution across the array of light spots projected by the lighting fixture 100. Of course, the lens units may be of different sizes; that is, at least one lens unit may have a different size from the others. This arrangement allows larger lens units to receive a greater amount of light from the light source, while smaller lens units receive a smaller amount of light from the light source. This results in some spots in the array of light spots projected by the lighting fixture 100 being brighter and larger than others, creating an effect of alternating larger and smaller spots.

[0040] The collimating optical element 130 may be a collimating lens. Multiple sub-beams are focused on the focal plane of the collimating optical element 130. The convergence point (image point) of each sub-beam is equivalent to a light-emitting point. The sub-beams emitted by the collimating optical element 130 are equivalent to being emitted from this light-emitting point. After the multiple sub-beams are refracted and collimated by the collimating optical element 130, the beam divergence angles are reduced, forming multiple sub-collimated beams. Because the multiple sub-beams are incident on the collimating optical element 130 at different angles, the multiple sub-beams are refracted and collimated by the collimating optical element 130 to form multiple sub-collimated beams propagating at different angles. Of course, in actual settings, the convergence point of the multiple sub-beams may deviate from the focal plane of the collimating optical element 130 to a certain extent. It is acceptable to focus the multiple sub-beams near the focal plane of the collimating optical element 130. For example, the distance between the convergence point of the multiple sub-beams and the focal plane of the collimating optical element 130 is less than or equal to 10% of the focal length of the collimating optical element 130. It is understood that the closer the convergence point of the multiple sub-beams is to the focal plane of the collimating optical element 130, the better the collimation effect of the multiple sub-beams can be achieved after passing through the collimating optical element 130. The collimating lens can be spherical or aspherical, and is preferably an aspherical collimating lens, which can achieve better collimation.

[0041] The reflector array 140 includes a plurality of plane reflectors arranged in an array along a curved surface, which can be a concave surface, a convex surface, or a cylindrical surface. After the multiple sub-collimated light beams emitted from the light collimating element 130 are incident on the reflector array 214, each plane reflector receives a small portion of each sub-collimated light beam and reflects it to a distant target projection surface. Since the multiple plane reflectors are arranged along a curved surface, the normal direction of each plane reflector varies slightly, so the directions of the multiple reflected light beams reflected by it are also different, thereby forming an array of multiple light spots on the target projection surface. The number of light spots is roughly the number of sub-beams divided by the lens array multiplied by the number of plane reflectors that receive the sub-collimated light beams. The number of light spots can be increased several times, achieving a "starry sky" lighting effect.

[0042] The lighting fixture 100 may further include a drive device connected to the lens array 120 to drive the lens array 120 to rotate, thereby changing the propagation direction of the multiple sub-beams formed by the lens array 120, so that after reflection by the reflector array 140, a dynamic light spot array effect is formed. Preferably, the drive device drives the lens array 120 to rotate along the central axis of the lens array 120, thereby creating a special effect in which the surrounding light spots rotate around the center.

[0043] In addition, the lighting fixture 100 may also include a driving mechanism connected to the reflector array 140 to drive the reflector array 40 to rotate or move periodically, thereby changing the emission direction of the reflected light to form a dynamic light spot array effect.

[0044] The solution of the first embodiment of the present invention divides the light emitted by the light source into multiple sub-beams through the lens array 120, and focuses the multiple sub-beams on the focal plane or near the focal plane of the collimating optical element 130. The convergence point of each sub-beam is equivalent to a light-emitting point. The multiple sub-beams are then collimated into multiple sub-collimated beams by the collimating optical element 130, so that the reflector array 140 reflects to form a light spot array. This solution only needs to use a lens array 120 to divide the light emitted by the light source to increase the number of projected light spots, reduces the number of devices that need to be installed, and does not have gaps that increase the space. The structure is simple, easy to install, and small in size, which is conducive to the miniaturization of the lighting fixture 100. The absence of gaps can effectively avoid the generation of stray light, improve the contrast of the projected light spot pattern, and enhance the decorative lighting effect.

[0045] Implementation method 2:

[0046] Figure 2 Schematic diagram of the structure of the lighting fixture 200 provided in the second embodiment of the present invention. Figure 3 In the Figure 1 The same components are denoted by the same numbers and their descriptions are omitted.

[0047] like Figure 2 As shown, the lighting fixture 200 includes a light source, a lens array 220, a collimating optical element 130, and a reflector array 140. The lighting fixture 200 differs from the lighting fixture 100 provided in the first embodiment in that the multiple lens units of the lens array 220 are located in different planes, and the focal length of at least one lens unit is different from the focal lengths of the other lens units, that is, at least one lens unit has a larger focal length and at least one lens unit has a smaller focal length. To ensure that the multiple sub-beams formed by the multiple lens units are collimated by the collimating optical element 130 to form collimated beams, the convergence points of the sub-beams are located at the focal plane of the collimating optical element 130 when necessary. Due to the different focal lengths of the lens units, the lens units with larger focal lengths are arranged farther from the collimating optical element 130, while the lens units with smaller focal lengths are closer to the collimating optical element 130. This ensures that the convergence points of the sub-beams formed by the mirror units are all located at the focal plane of the collimating optical element 130, thereby forming collimated beams after being collimated by the collimating optical element 130.

[0048] Furthermore, lens array 220 includes a central region and a peripheral region. The size and focal length of lens units 221 located in the central region are larger than the size and focal length of lens units 222 located in the peripheral region, and the distance between lens units located in the central region and the focal plane is larger than the distance between lens units located in the peripheral region and the focal plane. Because lens units 221 located in the central region are larger, lens units 221 are able to receive a greater amount of light emitted by the light source. The brightness and size of the light spots formed by the sub-beams split by lens units 221 and reflected by reflector array 140 are greater than the brightness and size of the light spots formed by the sub-beams split by lens units 222 and reflected by reflector array 140. Moreover, because lens units 221 are located in the central region and multiple lens units 221 are located in the peripheral region, the effect of multiple smaller, darker light spots surrounding a larger, brighter light spot is created.

[0049] To obtain a larger light spot, an angle expansion element is provided between the light source and the lens unit 221 in the middle region. This angle expansion element can be a diffuser, a single fly-eye lens, or a double fly-eye lens. The size of the angle expansion element is equal to or smaller than that of the lens unit 221. The distance between the angle expansion element and the lens unit 221 is smaller than the distance between the angle expansion element and the light source. For example, the distance between the angle expansion element and the lens unit 221 is less than half the distance between the angle expansion element and the light source. Preferably, the angle expansion element is provided adjacent to the light incident side of the lens unit 221 to prevent light rays diverged by the angle expansion element from being incident on adjacent lens units, thereby reducing interference when the lens array 220 divides the light emitted by the light source. By providing the angle expansion element, the light rays passing through the angle expansion element are diverged, thereby forming a larger light spot after being reflected by the reflector array 140. It can be understood that the angle expansion element is not limited to being set between the light source and the lens unit 221 in the middle area, but can also be between the light source and other lens units. There can also be multiple angle expansion elements, corresponding to multiple lens units respectively, so that multiple sub-beams form larger light spots after being reflected by the reflector array 140.

[0050] Implementation method three:

[0051] Figure 3 FIG. 3 is a structural diagram of a lighting fixture 300 provided in Embodiment 3 of the present invention. Figure 3 In the Figure 1 The same components are denoted by the same numbers and their descriptions are omitted.

[0052] like Figure 3As shown, the lighting fixture 300 includes a light source, a lens array 120, a collimating optical element 130, a reflector array 140, and an aperture 160. This lighting fixture 300 differs from the lighting fixture 100 provided in the first embodiment in that the lighting fixture 300 further includes an aperture 160 disposed between the lens array 120 and the collimating optical element 130. The aperture 160 is located on the focal plane of the collimating optical element 130 and includes a plurality of through holes corresponding to the convergence points of the plurality of sub-beams. In this embodiment, by disposing the aperture 160 on the focal plane of the collimating optical element 130, each sub-beam converges and passes through the through holes of the aperture 160. This can block stray light generated by reflections from the lens units of the lens array 120, by passing through the connections between the lens units, or by other optical components. This reduces the impact of stray light on the projected light spot of the lighting fixture 300 and improves the contrast of the light spot array.

[0053] The through-hole of the aperture 160 can be in the shape of a circle, an ellipse, a pentagram, a cross, a heart, a triangle, a square, a regular hexagon, a snowflake, or other shapes, so that the light spot projected by the lighting fixture 300 forms a corresponding shape. The shape of the through-hole of the aperture 160 can be determined based on the specific decorative effect, and one or more shapes can be selected and combined, without limitation.

[0054] Implementation method four:

[0055] Figure 4 FIG. 4 is a structural diagram of a lighting fixture 400 provided in a fourth embodiment of the present invention. Figure 4 In the Figure 3 The same components are denoted by the same numbers and their descriptions are omitted.

[0056] like Figure 4 As shown, the lighting fixture 400 includes a light source, a lens array 120, a collimating optical element 130, a reflector array 140, an aperture 160, and a polygonal prism 170. The difference between the lighting fixture 400 and the lighting fixture 300 provided in the third embodiment is that the lighting fixture 400 also includes a polygonal prism 170 located between the aperture 160 and the collimating optical element 130. The polygonal prism 170 includes at least two prism units, and the inclination angles of the incident surfaces or the exit surfaces of the at least two prism units are different. At least one sub-beam is incident on the at least two prism units, and each prism unit is used to refract light into different directions. For example, in Figure 4In the embodiment, the prism 170 includes a first prism unit located on the upper side and a second prism unit located on the lower side. The light-emitting surface of the first prism unit is tilted downward along the optical axis, and the light-emitting surface of the second prism unit is tilted upward along the optical axis. The upper half of the sub-beam passing through the middle area of ​​the lens array 120 is incident on the first prism unit, and the lower half of the sub-beam is incident on the second prism unit. The two parts of the sub-beam are refracted in different directions, and after being collimated by the collimating optical element 130 and reflected by the reflector array 140, they form different small light spot arrays. In this embodiment, by providing a multi-prism 170 between the aperture 160 and the collimating optical element 130, different parts of at least one sub-beam are refracted in different directions, further dividing the sub-beam, thereby increasing the number of light spots projected by the lighting fixture 400.

[0057] Implementation method five:

[0058] Figure 5 FIG. 5 is a structural diagram of a lighting fixture 500 provided in Embodiment 5 of the present invention. Figure 5 In the Figure 3 The same components are denoted by the same numbers and their descriptions are omitted.

[0059] like Figure 5 As shown, lighting fixture 500 includes a light source, a lens array 120, a collimating optical element 130, a reflector array 140, an aperture 160, and a color filter 180. This lighting fixture 500 differs from lighting fixture 300 provided in Embodiment 3 in that it further includes a color filter 180 positioned between aperture 160 and collimating optical element 130. Color filter 180 covers the optical path of at least one sub-beam. Color filter 180 allows light of a certain color to pass through while filtering out light of other colors. For example, color filter 180 is a red filter that covers the optical path of a sub-beam. After passing through the red filter, this sub-beam becomes red light. After being collimated by collimating optical element 130 and reflected by reflector array 140, this red light sub-beam forms a red light spot. Other sub-beams that do not pass through color filter 180 continue to form white light spots. Ultimately, lighting fixture 500 projects a red and white light spot effect. The type and number of color filters 180 can be determined based on the specific decorative effect and are not specifically limited herein. In this embodiment, by disposing color filters 180 between aperture 160 and collimating optical element 130, some sub-beams are filtered into different colors, thereby allowing lighting fixture 500 to project an array of light spots with different color distributions, thereby increasing the diversity of decorative effects.

[0060] Implementation method six:

[0061] Figure 6FIG. 6 is a structural diagram of a lighting fixture 600 provided in Embodiment 6 of the present invention. Figure 6 In the Figure 3 The same components are denoted by the same numbers and their descriptions are omitted.

[0062] like Figure 6 As shown, the lighting fixture 600 includes a light source, a lens array 120, a collimating optical element 130, a reflector array 140, an aperture 160, and a reflective device. The difference between the lighting fixture 600 and the lighting fixture 300 provided in the third embodiment is that the lighting fixture 600 also includes a reflective device located between the aperture 160 and the collimating optical element 130. The reflective device includes at least two reflectors. The at least two reflectors are arranged around the multiple sub-beams after passing through the aperture 160, and are used to collect part of the light of some sub-beams and reflect them to the collimating optical element 130. Figure 6 In the figure, the reflecting device includes a reflector 191 and a reflector 192. Among the multiple sub-beams after passing through the aperture 160, part of the light of the sub-beam located at the upper position is reflected by the reflector 191 and guided to the collimating optical element 130, and part of the light of the sub-beam located at the lower position is reflected by the reflector 192 and guided to the collimating optical element 130. According to the principle of reversible light path, the two beams of light reflected by the reflector 191 and the reflector 192 to the collimating optical element 130 are equivalent to those emitted by the virtual light-emitting points S4 and S5. By reasonably setting the position of the collimating optical element 130 so that the virtual light-emitting points S4 and S5 are located on the focal plane of the collimating optical element 130, the two beams of light can form a collimated light beam after passing through the collimating optical element 130, and then form a small light spot array after being reflected by the reflector array 140. In this embodiment, a reflective device is provided between the aperture 160 and the collimating optical element 130, so that part of the light of a part of the sub-beam is reflected by the reflective device and then guided to the collimating optical element 130, and the other part of the light is directly directed to the collimating optical element 130. Since the two parts of light enter the collimating optical element 130 at different angles, two collimated light beams are formed after passing through the collimating optical element 130, and then reflected by the reflector array 140 to form two small light spot arrays, thereby increasing the number of light spots projected by the lighting fixture 600.

[0063] Implementation method seven:

[0064] Figure 7 FIG. 7 is a structural diagram of a lighting fixture 700 provided in Embodiment 7 of the present invention. Figure 7 In the Figure 6 The same components are denoted by the same numbers and their descriptions are omitted.

[0065] like Figure 7As shown, the lighting fixture 700 includes a light source, a lens array 120, a collimating optical element 130, a reflector array 140, an aperture 160, a reflective device, and a convex lens 193. The difference between the lighting fixture 700 and the lighting fixture 600 provided in the sixth embodiment is that the lighting fixture 700 further includes a convex lens 193 located between the aperture 160 and the collimating optical element 130.

[0066] In the lighting fixture 600 provided in the sixth embodiment, part of the light of the sub-beams is reflected by the reflective device and then guided to the collimating optical element 130. The optical path of the part of the light is greater than the optical path of the light directly incident on the collimating optical element 130. At this time, the virtual light-emitting points S4 and S5 are located between the focal plane of the collimating optical element 130 and the lens array 130. Therefore, when the virtual light-emitting points S4 and S5 are located at the focal plane of the collimating optical element 130, the convergence points S1, S2, and S3 of each sub-beam are located between the focal plane of the collimating optical element 130 and the collimating optical element 130. 130, the distance between the convergence point of each sub-beam and the focal plane of the collimating optical element 130 is arranged to be less than or equal to 10% of the focal length of the collimating optical element 130. A convex lens 193 is disposed between the aperture 160 and the collimating optical element 130, so that the convex lens 193 collects and refracts light that is not reflected by the reflective device and then projects it onto the collimating optical element 130. Based on the principle of reversible optical path, the equivalent virtual light-emitting point of the light collected and refracted by the convex lens 193 is located on the side of the focal plane of the collimating optical element 130 that is away from the collimating optical element 130. Through reasonable design, the virtual light-emitting points S4 and S5 of the light reflected by the reflective device and the equivalent virtual light-emitting point of the light collected and refracted by the convex lens 193 can have the same optical path and are both located on the focal plane of the collimating optical element 130. This ensures that each portion of light passing through the collimating optical element 130 can achieve ideal collimation, thereby ensuring the size and brightness of the light spot projected by the lighting fixture 600.

[0067] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included in the scope of protection of the present invention.

Claims

1. A lighting fixture, characterized in that: include: light source; a lens array comprising a plurality of lens units, configured to split the light emitted by the light source into a plurality of sub-beams and converge the plurality of sub-beams respectively; a collimating optical element, wherein a distance between a convergence point of the plurality of sub-beams and a focal plane of the collimating optical element is less than or equal to 10% of a focal length of the collimating optical element, and the collimating optical element is used to collimate the plurality of sub-beams; a reflector array, configured to receive the collimated plurality of sub-beams and reflect them to form a light spot array; The invention also includes an aperture located at the focal plane, wherein the aperture includes a plurality of through holes respectively corresponding to the convergence points of the plurality of sub-beams.

2. The lighting fixture according to claim 1, characterized in that: The divergence angle of the light emitted by the light source is less than or equal to 60 degrees.

3. The lighting fixture according to claim 1, characterized in that: A size of at least one lens unit is different from sizes of the other lens units.

4. The lighting fixture according to claim 3, characterized in that: The focal length of at least one lens unit is different from the focal lengths of the other lens units, and the multiple lens units are located in different planes.

5. The lighting fixture according to claim 4, characterized in that: The lens array includes a middle area and a surrounding area, the size and focal length of the lens units located in the middle area are larger than the size and focal length of the lens units located in the surrounding area, and the distance between the lens units located in the middle area and the focal plane is larger than the distance between the lens units located in the surrounding area and the focal plane.

6. The lighting fixture according to claim 1, characterized in that: The lighting fixture also includes a polygonal prism located between the aperture and the collimating optical element, the polygonal prism includes at least two prism units, the incident surfaces or the exit surfaces of the at least two prism units have different inclination angles, and at least one sub-beam is incident on the at least two prism units.

7. The lighting fixture according to claim 1, characterized in that: The lighting fixture further includes a color filter located between the aperture and the collimating optical element, and the color filter covers the optical path of at least one of the sub-beams.

8. The lighting fixture according to claim 1, characterized in that: The lighting fixture further comprises a reflective device located between the aperture and the collimating optical element, and the reflective device is used to collect part of the light of the sub-beam and reflect it to the collimating optical element.

9. The lighting fixture according to claim 8, characterized in that: The lighting fixture further comprises a convex lens located between the aperture and the collimating optical element, and the convex lens is used to collect light that is not reflected by the reflective device.

10. The lighting fixture according to claim 5, characterized in that: An angle enlarging element is provided between the light source and at least one of the lens units.

11. The lighting fixture according to claim 1, characterized in that: The light source includes at least two sub-light sources and a light combining device. The at least two sub-light sources are respectively located on different sides of the light combining device. The light combining device is used to combine the light emitted by the multiple sub-light sources into one beam.

12. The lighting fixture according to claim 1, characterized in that The light source includes a plurality of sub-light sources arranged in an array, and each sub-light source corresponds to a lens unit.

13. The lighting fixture according to any one of claims 1 to 12, characterized in that: The lighting fixture further includes a driving device, which is used to drive the lens array to rotate.

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